反应详情

To a solution of 3,0 g 1-[(p-methoxybenzyloxy)-methyl]-6-phenyl-8-chloro-4H-s-triazolo[4,3-a][1,4]benzodiazepine in 30 ml of glacial acetic acid is added at 25° 24 ml 48% aqueous hydrobromic acid. The reaction mixture is stirred for 20 minutes, neutralised with 30% sodium hydroxide solution and extracted with methylenechloride. The organic phase is separated, washed with water, dried over sodium sulphate and evaporated to dryness. The crystallisation of the residue from acetate-ether-petrol ether yields 6-phenyl-8-chloro-4-H-s-triazolo[4,3-a][1,4]benzodiazepine-1-methanol, M.P. 209°-211°.

1. extractionextracted with methylenechloride
2. customThe organic phase is separated
3. washwashed with water
4. dry with materialdried over sodium sulphate
5. customevaporated to dryness
6. customThe crystallisation of the residue from acetate-ether-petrol ether